CN103741945A - External control construction method of super high-rise building core tube shaft net - Google Patents
External control construction method of super high-rise building core tube shaft net Download PDFInfo
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- CN103741945A CN103741945A CN201310736167.XA CN201310736167A CN103741945A CN 103741945 A CN103741945 A CN 103741945A CN 201310736167 A CN201310736167 A CN 201310736167A CN 103741945 A CN103741945 A CN 103741945A
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Abstract
The invention relates to a construction method, in particular to an external control construction method of a super high-rise building core tube shaft net, and aims at solving the problem of vertical accuracy control of super high-rise building core tube construction and providing the external control construction method of the super high-rise building core tube shaft net. The external control construction method comprises the steps of arranging a multilevel control net composed of control points within peripheral orientations of a building under construction, performing projection measurement on a building structure from projection faces, accurately positioning the shaft net with a tube structure to ensure that errors are not upward transferred and a core tube is constructed at high perpendicularity accuracy. The external control construction method utilizes a total station to perform lofting so as to externally control the perpendicularity of the core tube, and measured data deviation caused by frequent change of vertical transmission control points in a transitional method is avoided. The errors are not upward transferred, the core tube is constructed at high perpendicularity accuracy, the practical engineering requirement is met, the construction quality is ensured, the project progress is accelerated, and good economic and social benefits can be obtained.
Description
Technical field
The present invention relates to a kind of construction method, specifically a kind of super highrise building Core Walls Structure axle net external control construction method.
Technical background
Along with the fast development of China's economic construction, super highrise building develops rapidly. and various new constructions, newly-designed super highrise building continues to bring out. for the feature of super highrise building. propose new technical requirements, increased the difficulty of construction.Thereby require building construction technology to improve constantly to meet new technical development, guarantee that construction quality meets certainty of measurement requirement.The particularly construction of existing super high rise building core-tube partial, in the construction of super highrise building Core Walls Structure, Core Walls Structure shear wall is prior to floor slab construction, highly less in the situation that, by internal measurement, control, in the process of successively increasing, global error is less.But along with super highrise building design is more and more, Core Walls Structure surpasses certain altitude, and after 100 meters, the method for controlling by internal measurement can not guarantee its vertical precision.Therefore adopt internal control method to carry out shear wall construction control and have certain error.
Summary of the invention
The problem that the present invention controls in order to solve super highrise building Core Walls Structure construction vertical precision, provides a kind of super highrise building Core Walls Structure axle net external control construction method.
Technical scheme of the present invention is, a kind of super highrise building Core Walls Structure axle net external control construction method,, in building surrounding orientation, the Multistage Control net that control point forms is set, from each plane of projection to building structure, throw survey, axle net to tubular construction is accurately located, guarantee that error can upwards not transmit, guarantee that the verticality of Core Walls Structure is constructed with high accuracy.
Concrete grammar is, it is benchmark that reference point is controlled in the design that the owner of first take provides, at the scene in and the control net being comprised of several control points is set respectively in the ground region periphery that is not subject to construction infection; Control net is at the scene that chopped-off head is controlled net, and peripheral control net is that secondary is controlled net, and secondary is controlled net as the master reference point of on-the-spot all kinds of surveying works in future, and other establishment of control nets at different levels and the foundation of checking; Each control point according to controlling net, in architecture construction, utilizes measuring apparatus from each plane of projection to building structure, to throw survey, the axle net of core shell structure accurately located, and successively construction; When Core Walls Structure is controlled the axle net measurement and positioning of net, in time below 8 layers, adopt chopped-off head to control net and throw survey, when more than 8 layers, adopt secondary to control net and throw survey.
Scheme of the present invention utilizes total powerstation to carry out the verticality that setting-out carrys out external control Core Walls Structure, guarantee that error can upwards not transmit, the verticality that guarantees Core Walls Structure is constructed with degree of precision, according to engineering actual conditions, tradition control method is improved, one-level and secondary are set in building periphery certain limit and control net, guarantee building axis line Vertical precision, meet actual requirement of engineering, guarantee construction quality, speed up the work, can obtain good economic and social benefit.The present invention at every turn by with throwing survey to control the fixing permanent control point of net, has avoided traditional method vertical transmission control point often to change and cause departing from of survey data when survey is established.
Accompanying drawing explanation
Fig. 1 is control network arrangements figure of the present invention
Fig. 2 is chopped-off head control point constructional drawing
Fig. 3 is the A-A sectional drawing of Fig. 2
Fig. 4 is secondary control point constructional drawing
Fig. 5 is the B-B sectional drawing of Fig. 4
In figure: 1-Core Walls Structure, 2-building, control point outside 3-, control point inside 4-, 5-design basis control point, 6-reinforcing bar, 7-steel plate.
Specific implementation method
As schematically shown in Figure 1, first, the design basis control point that the owner of take provides is benchmark, at the scene in and the control net being comprised of several control points is set respectively in the ground region periphery that is not subject to construction infection;
The control net that control point, inner side 4 forms is at the scene that chopped-off head is controlled net, the peripheral control net that control point, outside 3 forms is that secondary is controlled net, secondary is controlled net as the master reference point of on-the-spot all kinds of surveying works in future, and other establishment of control nets at different levels and the foundation of checking;
Measuring apparatus adopts total powerstation, laser vertical instrument, laser transit, automatic compensated level, and the communication between survey crew adopts Walkie talkie;
Core Walls Structure is controlled net and is comprised of exterior wall control net and interior wall control net, and exterior wall is controlled net and with measuring apparatus, directly thrown survey by the control point of building surrounding; Throwing is outwards offset 20cm at Core Walls Structure exterior wall, forms exterior wall control line; Interior wall control line is by the inside pilot measurement of oriented exterior wall control line, and it is exactly the main shaft of Core Walls Structure four direction that interior wall is controlled net, with intersecting of four exterior wall control lines of East, West, South, North;
According to each control point of controlling net, in architecture construction, utilize measuring apparatus from each plane of projection to building structure, to throw survey, axle net to core shell structure is accurately located, and successively construction, when Core Walls Structure is controlled the axle net measurement and positioning of net, in time below 8 layers, adopt chopped-off head to control net and throw survey, when more than 8 layers, adopt secondary to control net and throw survey.
So, adopt the outer control techniques of axle net to carry out construction control, the Multistage Control net of being arranged by building external is thrown survey to building, thereby set up the control net of accurate interior exterior wall, for follow-up construction reduces difficulty of construction, shorten construction period, for guaranteeing that the verticality of building Core Walls Structure obtains comparatively ideal effect, can effectively reduce construction cost.
Anticipate as shown in Figure 2,3, control point preparation method: the buried depth at control point of the present invention is greater than the following 500mm of maximum depth of frozen ground of this area, use C20 concrete 800mm * 800mm * 1000mm to build, adopt 1.5m long, crosshair is pulled out on reinforcing bar 6 tops of diameter 25 mm; Go out ground and use MU10 shale brick, M7.5 masonry of cement mortar 1500mm * 1500mm * 300mm brick well, and people's cat ladder is set, the prefabricated 1000mm * 1000mm of upper cover concrete cover plate, sets up the high railing of 1200mm and protects.
The transmission of absolute altitude adopts and set up total powerstation on a horizontal control point of bottom, the absolute altitude of first Accurate Measurement instrument transverse axis, prism or reflector plate are set directly over instrument, then rotate total powerstation telescope to plumbness, measure the distance of point-to-point transmission, by calculating, try to achieve prism absolute altitude, then prism is high and be delivered on post.Absolute altitude upwards transmits and all should carry out separately the poor △ H of twice, twice measurement and should not be greater than 7mm, averages as end product.After absolute altitude transmission, temporary bench mark is set, the foundation of controlling as structural elevation on this floor.
Total powerstation angle-measurement accuracy 2 ", range measurement accuracy 2mm ± 2ppm, the required precision of Precision Elevation surveyor's level is at ± 0.5mm/km, the vertical laser plummet apparatus required precision 1/100000 of transmitting of planar point.
For avoiding temperature and temperature to affect measuring apparatus, optimal measuring time be chosen in morning 5:00-8:00 or the later period of 4:00 in afternoon carry out, avoid measuring setting-out in situation that atmosphere temperature-difference is large.
In the engineering time of whole engineering span, must guarantee the definitely constant of this control net, before and after avoiding, phase measuring system is inconsistent.The chopped-off head of setting up is at the scene measured net, and control nets at different levels destroy as met with, and controls net recover by peripheral secondary.Between control net, according to other height of level, the rudimentary net of senior network control system, interpenetrates between sane level net, forms measuring system.The axial line control stake at control point is arranged on the more stable and stronger place that is not subject to settlement influence beyond excavation of foundation pit line 2m, does 500mm concrete basis, and buried depth is greater than 1.9m, and reinforcing bar end face is carved crosshair, and each point is postponed and drawn a little to distant place.As time goes on the continuous rising of building, the continuous increase of gravity load, building can produce sedimentation, therefore will regularly detect the elevation correction value of spot height, to revise in time.Because the ambient conditions of job site is poor, produce the many factors destroying, repetition measurement number of times need be encrypted in chopped-off head level control point, correctly reliable to guarantee its coordinate figure.Each measure that to take benchmark level control point be foundation, with precision level, adopt the method for closed measurement of the level to check.
Claims (4)
1. a super highrise building Core Walls Structure axle net external control construction method, it is characterized in that, in building surrounding orientation, the Multistage Control net that control point forms is set, from each plane of projection to building structure, throw survey, axle net to tubular construction is accurately located, guarantee that error can upwards not transmit, guarantee that the verticality of Core Walls Structure is constructed with high accuracy.
2. super highrise building Core Walls Structure axle net external control construction method according to claim 1, it is characterized in that concrete grammar is: it is benchmark that reference point is controlled in design that the owner of first take provides, at the scene in and the control net being comprised of several control points is set respectively in the ground region periphery that is not subject to construction infection; Control net is at the scene that chopped-off head is controlled net, and peripheral control net is that secondary is controlled net, and secondary is controlled net as the master reference point of on-the-spot all kinds of surveying works in future, and other establishment of control nets at different levels and the foundation of checking; Each control point according to controlling net, in architecture construction, utilizes measuring apparatus from each plane of projection to building structure, to throw survey, the axle net of core shell structure accurately located, and successively construction; When Core Walls Structure is controlled the axle net measurement and positioning of net, in time below 8 layers, adopt chopped-off head to control net and throw survey, when more than 8 layers, adopt secondary to control net and throw survey.
3. super highrise building Core Walls Structure axle net external control construction method according to claim 1 and 2, is characterized in that measuring apparatus adopts total powerstation, laser vertical instrument, laser transit, automatic compensated level, and the communication between survey crew adopts Walkie talkie.
4. super highrise building Core Walls Structure axle net external control construction method according to claim 1 and 2, it is characterized in that control point buried depth is greater than the following 500mm of maximum depth of frozen ground of this area, use C20 concrete 800mm * 800mm * 1000mm to build, adopt the reinforcing bar top of long diameter 25 mm of 1.5m to pull out crosshair; Go out ground and use MU10 shale brick, M7.5 masonry of cement mortar 1500mm * 1500mm * 300mm brick well, and people's cat ladder is set, the prefabricated 1000mm * 1000mm of upper cover concrete cover plate, sets up the high railing of 1200mm and protects.
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Cited By (7)
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| CN105003076A (en) * | 2015-08-07 | 2015-10-28 | 俊川建筑科技有限公司 | Building construction system |
| CN105019657A (en) * | 2015-08-07 | 2015-11-04 | 俊川建筑科技有限公司 | Building construction system |
| CN105544982A (en) * | 2015-12-08 | 2016-05-04 | 上海市机械施工集团有限公司 | Construction method for hyperboloid torsional steel column |
| CN106746959A (en) * | 2016-11-28 | 2017-05-31 | 北京建工四建工程建设有限公司 | The construction method of deformation between a kind of solution high-rise building different structure |
| CN107217831A (en) * | 2017-04-28 | 2017-09-29 | 中建三局集团有限公司 | High-rise building Core Walls Structure horizontal structure construction method |
| CN108550316A (en) * | 2016-03-10 | 2018-09-18 | 大连大学 | The laser plummet of high-rise axis projection teaching mode throws survey method |
| CN110057348A (en) * | 2019-04-22 | 2019-07-26 | 上海建工一建集团有限公司 | Super high-rise building axis vertically throws survey method and its measurement point Turnoverplatform system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105003076A (en) * | 2015-08-07 | 2015-10-28 | 俊川建筑科技有限公司 | Building construction system |
| CN105019657A (en) * | 2015-08-07 | 2015-11-04 | 俊川建筑科技有限公司 | Building construction system |
| CN105544982A (en) * | 2015-12-08 | 2016-05-04 | 上海市机械施工集团有限公司 | Construction method for hyperboloid torsional steel column |
| CN105544982B (en) * | 2015-12-08 | 2017-08-25 | 上海市机械施工集团有限公司 | A kind of hyperboloid reverses steel column construction method |
| CN108550316A (en) * | 2016-03-10 | 2018-09-18 | 大连大学 | The laser plummet of high-rise axis projection teaching mode throws survey method |
| CN106746959A (en) * | 2016-11-28 | 2017-05-31 | 北京建工四建工程建设有限公司 | The construction method of deformation between a kind of solution high-rise building different structure |
| CN106746959B (en) * | 2016-11-28 | 2018-12-18 | 北京建工四建工程建设有限公司 | It is a kind of solve super high-rise building different structure between deformation construction method |
| CN107217831A (en) * | 2017-04-28 | 2017-09-29 | 中建三局集团有限公司 | High-rise building Core Walls Structure horizontal structure construction method |
| CN107217831B (en) * | 2017-04-28 | 2019-09-17 | 中建三局集团有限公司 | Super high-rise building Core Walls Structure horizontal structure construction method |
| CN110057348A (en) * | 2019-04-22 | 2019-07-26 | 上海建工一建集团有限公司 | Super high-rise building axis vertically throws survey method and its measurement point Turnoverplatform system |
| CN110057348B (en) * | 2019-04-22 | 2024-05-28 | 上海建工一建集团有限公司 | Super high-rise building axis vertical projection method and measuring point rotation platform system thereof |
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Application publication date: 20140423 |